ATechnical Notes

Serial port signals

The following table shows the printer’s serial port pinout.

Serial port signal descriptions

Signal name

Pin #

Printer I/O

Description

 

 

 

 

DCD

1

In

Data carrier detect

 

 

 

 

RxData

2

In

Received data

 

 

 

 

TxData

3

Out

Transmitted data

 

 

 

 

DTR

4

Out

Data terminal ready

 

 

 

 

Gnd

5

Signal ground

 

 

 

 

DSR

6

In

Data set ready

 

 

 

 

RTS

7

Out

Request to send

 

 

 

 

CTS

8

In

Clear to send

 

 

 

 

RI

9

Out

Ring indicator

 

 

 

 

A-8Phaser 300X Color Printer

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Tektronix Phaser 300X Serial port signals, Serial port signal descriptions, Signal name Pin # Printer I/O Description